Is it possible for a hobbyist to create/mold/grind/polish a lens element?
There seems to be lots of astronomy hobbyists polishing mirrors and occasionally a large lens element. Is there an equivalent hobby of creating (very rudimentary-quality) element or objective lenses for photography? I couldn't Google up any good info on this.
The Kodak Brownie was single-element and manufactured quite cheaply. What would it take to make something like that? What would be the simplest and/or cheapest way?
(Yes, I do know this is not practical. Yes, I could just strip old objective lenses. And yes, I do know the quality would be quite low.)